H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 83/00 (2006.01)
Patent
CA 2549709
An arc fault circuit breaker includes line and load terminals, separable contacts electrically connected between the terminals, a current sensor adapted to sense current associated with a load and flowing between the terminals and through the separable contacts. An arc fault detection circuit provides series arc protection and generates a trip signal responsive to the sensed current. The arc fault detection circuit collects a plurality of samples of the sensed current over plural line cycles, determines that the load is a dimmer-controlled load, determines a phase angle at which the sensed current begins conduction within one of the line cycles, and determines that the phase angle consistently moves in a forward direction or a reverse direction. If so, then series arc protection is responsively inhibited. An operating mechanism opens the separable contacts responsive to the trip signal.
Elms Robert T.
Parker Kevin L.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Corporation Eaton
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